According to the BTA observations, the redshift Z=0.7063+-0.0017 was
measured for a distant galaxy possessing the 24 magnitude, in which
there occurred an explosion of a massive star, followed by a gamma-ray
burst catalogued as GRB991208. The brightness evolution of
the corresponding variable optical source was tracked.
In collaboration with the Space Telescope Science Institute (USA), the Institute of Astrophysics of Andalusia (Spain).
The largest sample of 241 low-mass, gas-rich galaxies with active star
formation in the sky region of about 700 square degrees was created.
Its further study opens up the possibility of
observational testing of the chemical evolution models for these galaxies,
as well as the models of formation of the observed large-scale structure
of the Universe.
In collaboration with the University of Hamburg (Germany).
According to the Palomar Sky Survey, about 600 new nearby dwarf galaxies
were discovered. The anisotropy of the Hubble flow is detected, which
may be caused by the rotation of the Local Supercluster. The total mass
of the Local Group is estimated at 1.2 trillion solar masses, and its
relation to the luminosity on the scale of 1 Mpc is 23 +-4 in solar
units, which does not require the presence of a supermassive dark
halo around our Galaxy and the Andromeda galaxy.
In collaboration with the JSC of the Kiev University (Ukraine), and Max Planck Institute for Radio Astronomy (Germany).